<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0px;
            padding: 0px;
            list-style: none;
        }

        .mi {
            width: 100%;
            height: 600px;
            border: 1px solid red;



        }

        .mi-zhong {
            width: 1180px;
            height: 600px;
            margin: 0px auto;
            border: 1px solid blue;
        }

        .mi-left {
            width: 300px;
            height: 600px;
            float: left;
            border: 1px solid rebeccapurple;

        }

        .mi-right {
            width: 800px;
            height: 600px;
            float: left;
            border: 1px solid rebeccapurple;
            position: relative;
        }

        .mi-left ul li {
            width: 100px;
            height: 30px;
            line-height: 30px;

        }

        .mi-left-a {
            width: 800px;
            height: 600px;
            border: 1px solid red;
            position: absolute;
            left: 400px;
            background-color: brown;
            display: none;
            top: 0px;
        }
        .mi-left-b{
            width: 800px;
            height: 600px;
            border: 1px solid red;
            position: absolute;
            left: 400px;
            background-color: blue;
            display: none;
            top: 0px;
        }
        .mi-left-c{
            width: 800px;
            height: 600px;
            
            position: absolute;
            left: 400px;
            background-color: magenta;
            display: none;
            top: 0px;
        }
        .mi-left ul li:hover .mi-left-b {
            display: block;
        }
        .mi-left ul li:hover .mi-left-c {
            display: block;
        }
        .mi-left ul li:hover .mi-left-a {
            display: block;
        }
        

    </style>


</head>

<body>
    <div class="mi">
        <div class="mi-zhong">
            <div class="mi-left">
                <ul>
                    <li>手机数码
                        <div class="mi-left-a"></div>
                    </li>
                    <li>家电冰箱
                        <div class="mi-left-b"></div>
                    </li>
                    <li>健康
                        <div class="mi-left-c"></div>
                    </li>
                    <li>手机数码
                        <div class="mi-left-d"></div>
                    </li>
                    <li>家电冰箱
                        <div class="mi-left-a"></div>
                    </li>
                    <li>健康
                        <div class="mi-left-a"></div>
                    </li>
                </ul>
            </div>
            <div class="mi-right"></div>
        </div>

    </div>

    
</body>

</html>